57=7b+15

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Solution for 57=7b+15 equation:


Simplifying
57 = 7b + 15

Reorder the terms:
57 = 15 + 7b

Solving
57 = 15 + 7b

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-7b' to each side of the equation.
57 + -7b = 15 + 7b + -7b

Combine like terms: 7b + -7b = 0
57 + -7b = 15 + 0
57 + -7b = 15

Add '-57' to each side of the equation.
57 + -57 + -7b = 15 + -57

Combine like terms: 57 + -57 = 0
0 + -7b = 15 + -57
-7b = 15 + -57

Combine like terms: 15 + -57 = -42
-7b = -42

Divide each side by '-7'.
b = 6

Simplifying
b = 6

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